Carbureter.



0. H. VEEBER.

OARBURETER.

APPLICATION FILED 0013.31. 1910.

Patented Dec. 1, 1914.

2 SHEETS-SHEET 1.

C. H. VEEDER.

GARBURETER.

APPLIOATION FILED 00131v 1910.

Patented Dec. 1, 1914.

2 SHEETS-SHBET 2.

sail/3 20mm M 3 vwa M'oz CURTIS HUSSEY VEEDER, OF HARTFORD, CONNECTICUT.

CARBURETER Specification. of Letters Patent.

Patented Dec. 1, 1914.

Application filed October 31, 1910. Serial No. 590,073.

To all whom it may concern:

Be it known that I, CURTIS HUssnY VEEDER, a citizen of the United States, residing at the city of Hartford, in the State of Connecticut, have invented certain new and useful Improvements in Carbureters, of which the following is a specification, reference being had to the accompanying drawings, forming a part hereof.

This invention relates to the construction of carbureters such as are commonly employed in the production of the gaseous mixture of air and hydrocarbon vapor for use in internal combustion engines for automobiles.

The object of the invention is to provide improved means whereby the correct proportions of the mixture may be secured under all conditions of operation. Various attempts have been made to secure this result, but hitherto with rather indifferent success, for most carbureters heretofore pro duced have depended upon the carrying along of a proper quantity of hydrocarbon vapor by and with the current of air induced by the engine suction, such current of air acting directly upon the inflowing hydrocarbon and either producing or being intended to produce an evaporation in proportion to the volume of air delivered or being intended to act upon the supply of hydrocarbon with an aspirating action, inducing a flow of hydrocarbon in proportion to the velocity of the current of air. \Vitlr in a given range of engine speed, especially if such speed be moderately high, such do vices operate with a reasonable degre'. accuracy, but for extremes of engine speml they fail to maintain the proper proportions of the mixture. Moreover, the adjust ment of such devices, even for a given range of engine speed, is a matter of great difficulty and the adjustment, when once effected, is liable to be disturbed.

In accordance with the present invention the hydrocarbon is fed into the carburetor positively and the feed is directly and positively controlled by the inflowing current of air, which itself, as is usual, .is directly dependent upon the engine speed, so that the proper proportions of the mixture, when once determined, are maintained for all conditions. Moreover, such an arrangement admits of ready adjustment, so that it becomes easily possible to vary the proportions of the mixture should it appear to the operator to be desirable to do so.

The invention will be more fully explained hereinafter with reference to the accompanying drawings in which. it is illustrated and in which Figure l is a view, partly in elevation, as seen from the right hand in Fig. 2, and partly in vertical section, of a convenient and practical embodiment of the invention. Fig. 2 is a view partly in section on the plane indicated by the line 22 of Fig. 1. Fig. 3 is an end view of the air motor. Fig. 4 is a detail view of the motor disk. Fig. 5 is a detail view of the pump. Fig. 6 is a detail view of the pump-shaft bearing. Fig. 7 is a partial detail view of a portion of the variable transmitting devices for the pump. Fig. 8 is a detail view of a portion of the means for controlling the variable transmitting devices.

It will be obvious, as this descri tion roceeds, that the positive feed of t e by rocarbon may be effected by any suitable form of pump, and that the pump may be operated through any suitable form of trans- .mitting mechanism by any positive air motor adapted to be actuated by the inllowing current of air. Therefore, although one particular embodiment of the invention is shown in the drawings and described herein, it will also be understood that such embodiment of the invention is chosen merely as a convenient and practical illustration of the nature of the invention.

In the construction shown in the drawings the air to be carbureted is admitted at a to a shell or casing a. which is also provided with an outlet, as at (62, through which the air is carried on toward the engine. The interior of the shell or casing is divided transversely by a wall a", so that all of the air which enters is compelled to pass through an air motor 6, which is suitably connected to or otherwise formed as a part of the casing a, and is returned thence to the shell or casing a, on the other side of the wall a, to be carried onward from the outlet o The positive air motor shown is of the ordinary nntating disk type, such as is employed, for example, as a measuring device in certain well known types of water meters. It comprises a chamber 7), a nutating disk I) mounted within the chamber on a ball I),

slotted, as at b, to receive the extension of the plate or wall a above mentioned, and provided with an anti-friction stud 12 whlch moves in a groove Z2 of the outer shell l), thereby holding the disk from rotation while permitting it, in conjunction with the spherical bearing Z1 to have the required nutating movement. The spindle b of the disk b projecting at one side of the casing 6 engages a crank arm 0 on a shaft 0 which is,

mounted in a suitable bearing on the frame and carries, in the construction shown, a friction driving disk 0 The latter is en gaged by a cooperating friction disk d which is mounted on the pump shaft d so that the shaft shall rotate with the disk. In order that the periphery of the driven disk (Z may be held against the face of the driving disk 0 with a yielding pressure, the outer end of the shaft- (Z is mounted in a bearing block (Z which is mounted in turn in a yoke d pivoted as at (Z. The bearing block (Z is formed with a spring chamber d in which is placed a spring (Z adapted to be compressed more or less to provide the necessary pressure by a screw plunger 03 mounted in the outer end of the yoke d and provided with a lock nut d As a convenient means for varying the speed of the shaft d, and therefore of the pump hereinafter referred to, the driven disk cl is adapted to be moved longitudinally on the shaft d, having a sleeve d", which is'squared or otherwise formed to fit upon the shaft cl so that the two may rotate together while longitudinal movement of the sleeve and disk is permitted, and has a circumferential groove (Z engaged by a forked arm e. The latter is mounted upon a shaft e, mounted in suitable hearings in the frame and having an operating arm 6 provided with a spring detent e to prevent accidental movement. The pump 7 shown in the drawings is an ordinary rotary gear pump having one member f mounted on the pump shaft d and meshing with a similar member f both members rotating in a chamber f to which the hydrocarbon is admitted from a suitable source of supply through an inlet f and from which it is discharged through an outlet 7'. The latter is connected by a pipe f? with the hydrocarbon nozzle 9 which is suitably located in the outlet pipe a by which the air is conducted from the air motor toward the engine cylinder. As the hydrocarbon is delivered by the pump under considerable pressure, it will be delivered at the nozzle in a strong jet or spray and thereby more readily vaporized by the air.

It is desirable that the hydrocarbon shall be discharged at the nozzle as a jet or spray regardless of the ratio of discharge, and to this end the pressure of the hydrocarbon at the extremity of the nozzle should be kept uniform, whatever may be the ratio of discharge. This may be accomplished by varying the area of discharge in proportion to the pressure of the hydrocarbon, the velocity of discharge being thereby preserved, even pose of controlling the movable needle.

Thus, as shown in Fig. 1 ofv the drawings, the needle 9 is supported by one member of a bellows diaphragm g which is suitably located so as to be subject to the pressure of the hydrocarbon in its passage to the nozzle, as for example, in the chamber 9*. It will be seen that as the pressure increases the bellows diapl'iragm is expanded and the needle is moved in a direction to increase the area of discharge.

A throttle valve it may be provided, a usual, in the pipe at, and may be operated by any usual or suitable means. The pipe at, between the nozzle 9 and the throttle valve, may also be provided with a water jacket (1 and with inwardly projecting pins a for the purpose of securing a better separation and precipitation of the hydrocarbon which is not thoroughly vaporized before it passes farther from the carbureter.

It will now be seen that any usual or suit able positive motor, transmitting mechanism and pump may be substituted for the corresponding devices shown and described herein, and that the invention, therefore, is not limited to the particular construction shown and described. 7

I claim as my invention:

1. In a carbureter for internal combustion engines, the combination of an air pa sage through which the air is drawn to the engine, a measuring device in the air passage, including a chamber and a rotary member operative to alternately receive and discharge the contents of the chamber, and a positive feeding device for the hydrocarbon arranged to be actuated by said rotary member whereby the hydrocarbon is fed positively in proportion to the flow of air regardless of its velocity.

2. In a carbureter for internal combustion engines, the combination of an air passage through which the air is drawn to the engine, a measuring device in the air pas- Stlf; including a chamber and a rotary member opcrat'ne to alternately receive and discha ge the contents of the chamber, and a positive 'l eeding tlcvice-il'or the hydrocarbon arranged to be actuated by said rotary member. whereby the hydrocarbon is fed positively in pro iiortion to the llow of air regardless of its velocity, and variable connections between the actuating means and the feeding device.

1-. In a :arbureter for internal combustion engines, the combination of an air passage through which 'LllO air is drawn to the engine, a mrasuring device in the air passage, including a chamber and a rotary member operative to alternately receive and discharge the contents of the chamber, and a hydrocarbon pump and driving connections between the rotary measuring device and the pump, whereby the hydrocarbon is fed positively in proportion to the flow of air regardless of its velocity. i

In a carburetor for internal combustion engines, the combination of an air passage through which the air is drawn to the engine, a n'ieasuring device in the air passage, including a chamber and a rotary member operative to alternately receive and discharge the contents of the chamber, and a hydro arbon pump and driving connections between the rotary measuring device and the pump, "whereby the hydrocarbon is fed positively in proportion tothe {low of air regardless of its velocity, and variable driving connections between the measuring device and the pump.

6. In a carburetor for internal combustion engines, the combination with a carburetiug air passage a nutating dis-l; measuring device in the air passage, :1 hydro carbon pump, driving connections between the measuring device and pump, and a hydrocarbon nozzle through which the hydrocarbon is forced by the pump into the air passage, whereby the hydrocarbon is fed positively in proportion to the low of air regardless of its velocity.

T. 111 a carbureter for internal combustion engines, the combination with a carbureting passage of a hydrocarbon pump, an air motor operated by the current of air which passes through the carburetor, driv ing connections between the air motor and the pump, a hydrocarbon nozzle to which the hydrocarbon is forced by the pump, and means controlled by the pressure of the hy- (lrocarbtm before it reaches the nozzle to ii1- crease the area of discharge of the hydrocarbon with an increase of pressure.

8. In acarburetor for internal combustion engines, the combination with a carbureting passage of a hydrocarbon pump, an air mo tor operated by the current of air which passes through the carburetor, driving connections between the air motor and the pump, a hydrocarbon nozzle to which the hydrocarbon is forced by the pump, a movable needle to control the discharge through the nozzle, and means subject to the pressure of the hydrocarbon and connected to the needle to vary the position thereof.

This specification signed and witnessed this 28th day of October, A. D. 1.910.

CUR'ITS IIUSSEY VEEDER.

Signed in the presence of* Annaosn L. Ottlnm, ELLA J. Kantian. 

